But a later message said "there is no longer a tsunami threat from this earthquake" and that the center hadn't observed any tsunami waves.
A USA agency has issued a tsunami threat message for parts of Peru and Chile's coastlines after a powerful quake. There have been no immediate reports of casualties or damage. There's a possibility of "hazardous tsunami waves" along the coast of Peru within 300 km of the epicenter, the agency warned.
The quake hit at 0918 GMT at a depth of around 10 km (6 miles), according to the USGS.
It also says waves are forecast to be less than 0.3 metres for the coasts of Chile. According to Peru's government Geophysical Institute, the quake was of magnitude 6.7 with its epicenter in Lomas, in the southern region of Arequipa.
It wasn't immediately clear if a tsunami warning has been issued.